ANT+ and USB-C on an HP Spectrex2

I have a near new HP Spectre x2 tablet.  It has a USB-C port.  I have the ANT+ and have it connected via a USB-C to USB adaptor.  In the computers Device Manager, it recognises the ANT+. 

I just can’t seem to pair the ANT+ with Zwift.  Not sure what to do next.

I’m having the same issue on a Win 10 - Dell XPS 13.

Any ideas?